A state traffic camera shows tail lights backed up Thursday morning on eastbound Interstate 4 well beyond Bethlehem Road, about a mile and a half west of the Branch Forbes Road closure near Plant City.

PLANT CITY — Another possible sinkhole Thursday closed a road near here, this time one that was being used as an alternate for traffic snarled by nearby lane closures on Interstate 4.

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The most recent road depression, described as mostly cracks in the pavement, closed the westbound lane of U.S. 92 at Ritter Street, west of Thonotosassa, said Florida Department of Transportation spokeswoman Marian Scorza.

The road backed up for miles Thursday afternoon as officials worked to identify a detour for the detour.

Two miles away, three eastbound I-4 lanes near Branch Forbes Road have been closed since Tuesday after officials discovered a depression caused by soil settlement that was initially feared to be a sinkhole.

It's unclear if the new depression was caused by a sinkhole, but DOT officials are not taking any chances.

At the nearby Branch Forbes Road entrance ramp to I-4, construction crews were still drilling holes and pumping concrete beneath the roadway. Only one right lane remained open Thursday as the work continued.

DOT officials said it wasn't clear when the other lanes will reopen.

U.S. 92 was a suggested detour from the Branch Forbes problem, that part of that road will now be closed while crews investigate.

The Florida Highway Patrol said drivers can also use Thonotosassa Road north of I-4, which turns into Sam Allen Road and connects to SR 39, which connects with I-4.